In a medium bowl, beat together cream cheese and butter/peanut butter until smooth. Mix in confectioner?s sugar, brown sugar and vanilla. Stir in chocolate chips and nuts, if you're using them. Cover, and chill in the refrigerator for at least 2 hours or until firm.

Scoop cream cheese onto a big piece of plastic wrap and using the wrap, shape into a ball (if you are making this for Super Bowl, you can shape and decorate into a football.) Chill in the refrigerator for 1 hour or overnight. If it's really soft, pop it into the freezer for a half an hour. Right before you're ready to serve, cover (or roll) the ball with mini chocolate chips or chopped nuts (or whatever you want).

Serve with chocolate wafer cookies, graham crackers, broken waffle cones, or whatever you want. Note - this will soften a bit after you take it out of the fridge, but you want it soft. If it's too hard, it won't spread well on the cookies.